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• Android: Strange out of memory issue

  - by Chrispix

  I am not sure where to start to explain this one. I have a list view with a couple image buttons on each row. When you click the list row, it launches a new activity. If you review some of my other posts, I have had to build my own tabs because of an issue w/ the camera layout. The activity that gets launched for result is a map. If I click on my button to launch the image preview (load an image off the sd card) the application returns from the activity back to the listview activity to the result handler to relaunch my new activity which is nothing more than an image widget. So here is the issue, the image preview on the list view is being done w/ the cursor & listadapter. This makes it pretty simple, but I am not sure how I can put a resized (i.e. smaller bit size not pixel) image as the src for the imgbutton on the fly. So I just resized the image that came off the phone camera. The issue is that I get an out of memory error when it tries to go back and re-launch the 2nd activity. ** My question : is there a way I can build the list adapter easily row by row, where I can resize on the fly (bit wise)? - this would be preferable as I also need to make some changes to the properties of the widgets/elements in each row as I am unable to select a row w/ touch screen b/c of focus issue. (I can use roller ball). ** I know I can do an out of band resize and save of my image, but that is not really what I want to do, but some sample code for that would be nice if that is your suggestion. As soon as I disabled the image on the listview it worked fine again. FYI : This is how I was doing it : String[] from = new String[] { DBHelper.KEY_BUSINESSNAME, DBHelper.KEY_ADDRESS, DBHelper.KEY_CITY, DBHelper.KEY_GPSLONG, DBHelper.KEY_GPSLAT, DBHelper.KEY_IMAGEFILENAME + ""}; to = new int[] { R.id.businessname, R.id.address, R.id.city, R.id.gpslong, R.id.gpslat, R.id.imagefilename }; notes = new SimpleCursorAdapter(this, R.layout.notes_row, c, from, to); setListAdapter(notes); Where R.id.imagefilename is a ButtonImage Here is my LogCat 01-25 05:05:49.877: ERROR/dalvikvm-heap(3896): 6291456-byte external allocation too large for this process. 01-25 05:05:49.877: ERROR/(3896): VM won't let us allocate 6291456 bytes 01-25 05:05:49.877: ERROR/AndroidRuntime(3896): Uncaught handler: thread main exiting due to uncaught exception 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): java.lang.OutOfMemoryError: bitmap size exceeds VM budget 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:304) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:149) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:174) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.graphics.drawable.Drawable.createFromPath(Drawable.java:729) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.ImageView.resolveUri(ImageView.java:484) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.ImageView.setImageURI(ImageView.java:281) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.SimpleCursorAdapter.setViewImage(SimpleCursorAdapter.java:183) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.SimpleCursorAdapter.bindView(SimpleCursorAdapter.java:129) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.CursorAdapter.getView(CursorAdapter.java:150) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.AbsListView.obtainView(AbsListView.java:1057) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.ListView.makeAndAddView(ListView.java:1616) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.ListView.fillSpecific(ListView.java:1177) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.ListView.layoutChildren(ListView.java:1454) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.AbsListView.onLayout(AbsListView.java:937) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.view.View.layout(View.java:5611) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1108) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.LinearLayout.onLayout(LinearLayout.java:922) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.view.View.layout(View.java:5611) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.FrameLayout.onLayout(FrameLayout.java:294) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.view.View.layout(View.java:5611) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:999) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.LinearLayout.onLayout(LinearLayout.java:920) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.view.View.layout(View.java:5611) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.widget.FrameLayout.onLayout(FrameLayout.java:294) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.view.View.layout(View.java:5611) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.view.ViewRoot.performTraversals(ViewRoot.java:771) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.view.ViewRoot.handleMessage(ViewRoot.java:1103) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.os.Handler.dispatchMessage(Handler.java:88) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.os.Looper.loop(Looper.java:123) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at android.app.ActivityThread.main(ActivityThread.java:3742) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at java.lang.reflect.Method.invoke(Method.java:515) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:497) 01-25 05:05:49.917: ERROR/AndroidRuntime(3896): at dalvik.system.NativeStart.main(Native Method) 01-25 05:10:01.127: ERROR/AndroidRuntime(3943): ERROR: thread attach failed I also have a new error when displaying an image : 01-25 22:13:18.594: DEBUG/skia(4204): xxxxxxxxxxx jpeg error 20 Improper call to JPEG library in state %d 01-25 22:13:18.604: INFO/System.out(4204): resolveUri failed on bad bitmap uri: 01-25 22:13:18.694: ERROR/dalvikvm-heap(4204): 6291456-byte external allocation too large for this process. 01-25 22:13:18.694: ERROR/(4204): VM won't let us allocate 6291456 bytes 01-25 22:13:18.694: DEBUG/skia(4204): xxxxxxxxxxxxxxxxxxxx allocPixelRef failed

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• help me understand the following javascript relate to AsyncFileUpload control

  - by sean717

  Hi, in my current project I used a AsyncFileUpload control from AJAX Control Toolkits. After I got the async file upload part working, I needed to filter the file type so users can only upload image files. I found the following code off web and it worked well: function uploadStarted(sender, args) { var filename = args.get_fileName(); var filext = filename.substring(filename.lastIndexOf(".") + 1); if (filext == "jpg" || filext == "jpeg" || filext == "gif" || filext == "bmp") { return true; } else { // force uploading cancel args.set_cancel(true); // set reason of cancel args.set_errorMessage("Invalid File Format Selected"); return false; } } The problem is : I don't understand this javascript. What is the type of args parameter? Where are the methods such as "get_fileName()", "set_cancel()" defined? I went to the homepage of the AsyncFileUpload control but couldn't find any documentation regarding the "args". Can someone help me out explaining this Javascript? Thanks

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• UIImagePickerController and extracting EXIF data from existing photos

  - by tomtaylor

  It's well known that UIImagePickerController doesn't return the metadata of the photo after selection. However, a couple of apps in the app store (Mobile Fotos, PixelPipe) seem to be able to read the original files and the EXIF data stored within them, enabling the app to extract the geodata from the selected photo. They seem to do this by reading the original file from the /private/var/mobile/Media/DCIM/100APPLE/ folder and running it through an EXIF library. However, I can't work out a way of matching a photo returned from the UIImagePickerController to a file on disk. I've explored file sizes, but the original file is a JPEG, whilst the returned image is a raw UIImage, making it impossible to know the file size of the image that was selected. I'm considering making a table of hashes and matching against the first x pixels of each image. This seems a bit over the top though, and probably quite slow. Any suggestions?

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• Image cropping in PHP is producing blank result

  - by thinkswan

  I'm simply trying to crop a JPEG image (no scaling) using PHP. Here is my function, along with the inputs. function cropPicture($imageLoc, $width, $height, $x1, $y1) { $newImage = imagecreatetruecolor($width, $height); $source = imagecreatefromjpeg($imageLoc); imagecopyresampled($newImage,$source,0,0,$x1,$y1,$width,$height,$width,$height); imagejpeg($newImage,$imageLoc,90); } When I call it as follows--cropPicture('image.jpg', 300, 300, 0, 0)--the function completes properly, but I'm left with a black image that is 300x300 px (in other words, a blank canvas). Am I passing in the wrong arguments? The image exists and is writeable.

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• Image scaling in C

  - by Ganesh

  Hi, I am designing a jpeg to bmp decoder which scales the image. I have been supplied with the source code for the decoder so my actual work is to design a scaler . I do not know where to begin. I have scouted the internet for the various scaling algorithms but am not sure where to introduce the scaling. So should I do the the scaling after the image is converted into bmp or should I do this during the decoding at the MCU level. am confused :( If you guys have some information to help me out, its appreciated. any material to read, source code to analyse etc....

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• Robust and fast checksum algorithm?

  - by bene

  Which checksum algorithm can you recommend in the following use case? I want to generate checksums of small JPEG files (~8 kB each) to check if the content changed. Using the filesystem's date modified is unfortunately not an option. The checksum need not be cryptographically strong but it should robustly indicate changes of any size. The second criterion is speed since it should be possible to process at least hundreds of images per second (on a modern CPU). The calculation will be done on a server with several clients. The clients send the images over Gigabit TCP to the server. So there's no disk I/O as bottleneck.

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• NDK do not find the standard C++ libraries

  - by Marcos Vasconcelos

  Hi, I'm trying to compile a native program for android. But when runnning the ndk-build command I got the following result. /home/marcos/dev/workspace/rmsdk.native.wraper/jni/include-all/uft_alloc.h:26:21: error: stdexcept: No such file or directory /home/marcos/dev/workspace/rmsdk.native.wraper/jni/include-all/uft_alloc.h:27:18: error: limits: No such file or directory stdexcept and limits are part of the std C++ lib. This is my Android.mk LOCAL_PATH := $(call my-dir) MY_PATH := $(LOCAL_PATH) include $(call all-subdir-makefiles) LOCAL_PATH := $(MY_PATH) include $(CLEAR_VARS) LOCAL_LDLIBS := -llog LOCAL_MODULE := rmsdk LOCAL_SRC_FILES := curlnetprovider.cpp RMServices.cpp LOCAL_C_INCLUDES := $(LOCAL_PATH)/include-all LOCAL_STATIC_LIBRARIES := adept cryptopenssl curl dp expat fonts hobbes jpeg mschema png t3 xml zlib include $(BUILD_SHARED_LIBRARY) I should explicit tell that it's a C++ source?

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• Assinging a GD reference to a new variable fails to copy

  - by Stomped

  This is a contrived example, but it illustrates my problem much more concisely then the code I'm using - and I've tested this and it exhibits the problem: $image = imagecreatefromjpeg('test.jpg'); $copy_of_image = $image; // The important bit imagedestroy($image); header('Content-type: image/jpeg'); imagejpeg($copy_of_image); Now, my expectation is that $copy_of_image is exactly that, but when I run this, it fails, printing out the URL of the script of all things. Comment out the imagedestroy() and it works just fine. a var_dump of $image provides: resource(3) of type (gd) So why can't I copy this? Apparently the assignment $copy_of_image = $image is creating a reference rather then a copy - is there a way to prevent that?

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• How to capture screen with timer using C#?

  - by ankush

  This is a Windows application using C#. I want to capture a screen shot with a timer. The timer is set to a 5000 ms interval. As the timer is started, the desktop screen should be captured with the source window caption. try { System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer(); timer.Tick += new EventHandler(timer2_Tick); timer.Interval = (100) * (50); timer.Enabled = true; timer.Start(); ScreenShots sc = new ScreenShots(); sc.pictureBox1.Image = system_serveillance.CaptureScreen.GetDesktopImage(); while(sc.pictureBox1.Image != null) { sc.pictureBox1.Image.Save("s"+".jpg", System.Drawing.Imaging.ImageFormat.Jpeg); sc.pictureBox1.Image = null; } This code is not working properly. How can I make it work?

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• How can I write javascript that will load and print a web page to an image file and put that file in a specified location

  - by Rben

  Here's what I want to do: Load a web page from a specific location Print that web page into a jpeg, png, or other graphic file format Upload that image to another site, or save it to a location on my local network I know about window.print(), but that always seems to open up a print window, and I'd like to do as much of this operation silently as possible. Essentially, I want to be able to take a snap shot of the web page so it can be put in a directory that is accessed by one of those electronic picture frames. They can either access a web-based service, or a directory on the local network. Thanks in advance for your help, Rben

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• Why can't I fetch an AOL captcha image in my Delphi program?

  - by Bill

  New demo code: I am trying to get the captcha image from a AOL, and i keep getting an error 418. unit imageunit; /// /// h t t p s://new.aol.com/productsweb/ /// interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, IdIOHandler, IdIOHandlerSocket, IdIOHandlerStack, IdSSL, IdSSLOpenSSL, IdIntercept, IdZLibCompressorBase, IdCompressorZLib, IdCookieManager, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient, IdHTTP,jpeg,GIFImg, ExtCtrls, PerlRegEx; type TForm2 = class(TForm) IdHTTP1: TIdHTTP; IdCookieManager1: TIdCookieManager; IdCompressorZLib1: TIdCompressorZLib; IdConnectionIntercept1: TIdConnectionIntercept; IdSSLIOHandlerSocketOpenSSL1: TIdSSLIOHandlerSocketOpenSSL; Panel1: TPanel; Image1: TImage; Panel2: TPanel; Button1: TButton; PerlRegEx1: TPerlRegEx; Memo1: TMemo; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form2: TForm2; implementation {$R *.dfm} function getaimcaptchaimage(data:string):string; var Regex: TPerlRegEx; ResultString: string; begin Regex := TPerlRegEx.Create(nil); Regex.RegEx := '= 1 then begin ResultString := Regex.SubExpressions[1]; end; result:=Resultstring; end; end; procedure TForm2.Button1Click(Sender: TObject); var JPI : TJPEGImage; streamdata:TMemoryStream; SStream: Tstringstream; website:string; begin streamdata := TMemoryStream.Create; SStream := tstringstream.Create ( '' ); try idhttp1.Get('h t t p s://new.aol.com/productsweb/',SStream); memo1.Text:=UTF8ToWideString ( SStream.DataString ); website:='h t t p s://new.aol.com/productsweb/WordVerImage'+getaimcaptchaimage( UTF8ToWideString ( SStream.DataString )); form2.Caption:=website; idhttp1.Get(website, Streamdata); Except { Handle exceptions } On E : Exception Do Begin MessageDlg('Exception: '+E.Message,mtError, [mbOK], 0); End; End; //h t t p s://new.aol.com/productsweb/WordVerImage?20890843 //h t t p s://new.aol.com/productsweb/WordVerImage?91868359 /// /// gives error 418 unused /// streamdata.Position := 0; JPI := TJPEGImage.Create; Try JPI.LoadFromStream ( streamdata ); Finally Image1.Picture.Assign ( JPI ); JPI.Free; streamdata.Free; End; end; end. Form: object Form2: TForm2 Left = 0 Top = 0 Caption = 'Form2' ClientHeight = 247 ClientWidth = 480 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] OldCreateOrder = False PixelsPerInch = 96 TextHeight = 13 object Panel1: TPanel Left = 0 Top = 41 Width = 480 Height = 206 Align = alClient TabOrder = 0 object Image1: TImage Left = 1 Top = 1 Width = 478 Height = 115 Align = alClient ExplicitLeft = 5 ExplicitTop = 17 ExplicitWidth = 200 ExplicitHeight = 70 end object Memo1: TMemo Left = 1 Top = 116 Width = 478 Height = 89 Align = alBottom TabOrder = 0 ExplicitLeft = 80 ExplicitTop = 152 ExplicitWidth = 185 end end object Panel2: TPanel Left = 0 Top = 0 Width = 480 Height = 41 Align = alTop TabOrder = 1 object Button1: TButton Left = 239 Top = 6 Width = 75 Height = 25 Caption = 'Button1' TabOrder = 0 OnClick = Button1Click end end object IdHTTP1: TIdHTTP Intercept = IdConnectionIntercept1 IOHandler = IdSSLIOHandlerSocketOpenSSL1 MaxAuthRetries = 100 AllowCookies = True HandleRedirects = True RedirectMaximum = 100 ProxyParams.BasicAuthentication = False ProxyParams.ProxyPort = 0 Request.ContentLength = -1 Request.Accept = 'image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-s' + 'hockwave-flash, application/cade, application/xaml+xml, applicat' + 'ion/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-' + 'application, */*' Request.BasicAuthentication = False Request.Referer = 'http://www.yahoo.com' Request.UserAgent = 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.1) Gecko/201001' + '22 firefox/3.6.1' HTTPOptions = [hoForceEncodeParams] CookieManager = IdCookieManager1 Compressor = IdCompressorZLib1 Left = 40 Top = 160 end object IdCookieManager1: TIdCookieManager Left = 360 Top = 136 end object IdCompressorZLib1: TIdCompressorZLib Left = 408 Top = 56 end object IdConnectionIntercept1: TIdConnectionIntercept Left = 304 Top = 72 end object IdSSLIOHandlerSocketOpenSSL1: TIdSSLIOHandlerSocketOpenSSL Intercept = IdConnectionIntercept1 MaxLineAction = maException Port = 0 DefaultPort = 0 SSLOptions.Mode = sslmUnassigned SSLOptions.VerifyMode = [] SSLOptions.VerifyDepth = 0 Left = 192 Top = 136 end object PerlRegEx1: TPerlRegEx Options = [] Left = 120 Top = 56 end end If you go to h t t p s://new.aol.com/productsweb/ you will notice the captcha image has a url like h t t p s://new.aol.com/productsweb/WordVerImage?91868359 I put that url in the edit box and get an error. What is wrong with this code? *take the extra spaces out of the URLs

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• How to add a URL and Buttons on top of an Existing Header Image

  - by tonsils

  Hi, 1) I have a header jpeg image that spans a width of 996px that has a square logo to the left of this header. My question is that I would like to use this square logo section only and place a ahref tag so that when the user hover's over this section only, the cursor changes to a hand pointer and the user will be redirected back to the landing page. Any assistance on this would be great. 2) On this same image, I would also like to place two buttons with rollover effects, so when the user hovers over the buttons, the rollover effect takes control and then would like these buttons to also point to a href url. Again, any help on this would be appreciated. Thanks.

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• php gd image quality

  - by apueee

  I 'm trying to add text on a specific image. Its working perfectly but the quality of image is low especially for papyrus.ttf font. How can i improve the quality of text in the image. But i need high quality to print the output. Here is my code.. its very simple. header("Content-Type: image/jpeg"); $im = imagecreatefromjpeg("cosmos.jpg"); $black = ImageColorAllocate($im, 0, 0, 0); Imagettftext($im, 14, 0, 10, 15, $black, 'papyrus.ttf', "Corey and Lisa "); Imagettftext($im, 14, 0, 10, 35, $black, 'papyrus.ttf', " 1994, june"); Imagejpeg($im, '', 100); ImageDestroy($im); Download: http://wneeds.com/gdtest.zip

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• Can't set up image upload in Django

  - by culebrón

  I can't understand what's not working here: 1) settings MEDIA_ROOT = '/var/www/satel/media' MEDIA_URL = 'http://media.satel.culebron' ADMIN_MEDIA_PREFIX = '/media/' 2) models class Photo(models.Model): id = models.AutoField(primary_key=True) name = models.CharField(max_length = 200) desc = models.TextField(max_length = 1000) img = models.ImageField(upload_to = 'upload') 3) access rights: drwxr-xrwx 3 culebron culebron 4.0K 2010-04-14 21:13 media drwxr-xrwx 2 culebron culebron 4.0K 2010-04-14 19:04 upload 4) SQL: CREATE TABLE "photos_photo" ( "id" integer NOT NULL PRIMARY KEY, "name" varchar(200) NOT NULL, "desc" text NOT NULL, "img" varchar(100) NOT NULL ); 4) run Django test server as myself. 5) result: SuspiciousOperation at /admin/photos/author/add/ Attempted access to '/var/www/satel/upload/OpenStreetMap.png' denied. Not a PIL & jpeg issue, seems not to be access rights issue. But what's wrong?

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• Why does "enable-shared failed" happen on libjpeg build for os X?

  - by BryanWheelock

  I'm trying to install libjpeg on os X to fix a problem with the Python Imaging Library JPEG setup. I downloaded libjpeg from http://www.ijg.org/files/jpegsrc.v7.tar.gz I then began to setup the config file cp /usr/share/libtool/config.sub . cp /usr/share/libtool/config.guess . ./configure –enable-shared However, the enable-shared flag didn't seem to work. $ ./configure –-enable-shared configure: WARNING: you should use --build, --host, --target configure: WARNING: invalid host type: –-enable-shared checking build system type... Invalid configuration `–-enable-shared': machine `–-enable' not recognized configure: error: /bin/sh ./config.sub –-enable-shared failed I've done lot's of google searches and I can't figure out where the error is or how to work around this error.

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• How to recognize touch events and control a script object inside UIWebView?

  - by Markus S.

  Situation: I have an UIView with an UIWebView in it. When the viewDidLoad the Javascript Object inside the UIWebView is called (Microsoft Seadragon AJAX JS). For your Understanding: Seadragon loads a specified megapixel image(JPEG) and in a Desktop Browser like Firefox i can Zoom into the image and I can drag the crop for example from the middle to the left. In the iPhone Simulator (for iPad) only the Zooming Function is working on one single tap but when i try to drag the crop (with left mouse button click and holding it) I'm dragging the whole UIWebView but not the crop of course! Is that feature which the simulator isn't able to handle or what's yout solutin guys? Special Thanks!! P.S.: It's a bit jiggling when the zooming function of Seadragon is called. Is that authentic to the real performance of the iPad or does the simulator not have the power as the iPad has?

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• newbie: how to upload images from a form with PHP and mySQL

  - by paracaudex

  I'm creating a web app (locally, so security doesn't matter) in PHP where the user uploads a set of information and a small .jpeg, which is then inserted into a mySQL table. I can do this no problem with all the text data, but I'm not sure how to cause the image to upload alongside it. I assume I will have to use the blob data type and input type="file", but I fooled around with that a little bit and the solution doesn't seem to be an intuitive extension of how input type="text" works. Do I need to do a lot more PHP scripting to get this to work? Is it possible to upload an image with a form, or is there a necessary intermediate step?

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• extract payload from tcpflow output

  - by Felipe Alvarez

  Tcpflow outputs a bunch of files, many of which are HTTP responses from a web server. Inside, they contain HTTP headers, including Content-type: , and other important ones. I'm trying to write a script that can extract just the payload data (i.e. image/jpeg; text/html; et al.) and save it to a file [optional: with an appropriate name and file extension]. The EOL chars are \r\n (CRLF) and so this makes it difficult to use in GNU distros (in my experiences). I've been trying something along the lines of: sed /HTTP/,/^$/d To delete all text from the the beginning of HTTP (incl) to the end of \r\n\r\n (incl) but I have found no luck. I'm looking for help from anyone with good experience in sed and/or awk. I have zero experience with Perl, please I'd prefer to use common GNU command line utilities for this Find a sample tcpflow output file here. Thanks, Felipe

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• How to Export Images from an Image List in VS2005?

  - by cbuck12000

  Using Visual Studio 2005, is there a way to export the images in an Image List to individual files on my PC? Using the IDE, I select the Image List and view its properties. In the "Images" property, I launch the Images Collection Editor dialog. I can only add and remove images, but I cannot find a way to export an image that is already in the list. Why? The developer who made the original list has left our company and I need the images for an ASP.NET application (will convert to .jpeg). Thank you for the help!

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• Setting outbound 'Expires:' in Squid server's HTTP header

  - by IkeaPimp

  I'm having a problem where items served by my Squid server are being cached by Limelight for too long, sometimes days. It happens when a piece of content has been static for a long time (weeks) and then undergoes numerous changes in a matter of hours. Limelight gets its content from our Squid server and I'm told that if I can add 'Expires: 15m' in the HTTP header the Squid server sends, Limelight will not cache the image for more than 15 min. Unfortunately, I can fond no setting in Squid that will allow me to add this to the header. Here's the HTTP header as presently being sent: HTTP/1.0 200 OK Date: Tue, 15 Dec 2009 23:57:33 GMT Server: nginx/0.5.26 Content-Type: image/jpeg Content-Length: 83843 Last-Modified: Tue, 15 Dec 2009 23:52:00 GMT Accept-Ranges: bytes Age: 450 X-Cache: HIT from squid01.prod.mydomain X-Cache-Lookup: HIT from squid01.prod.mydomain:3128 Via: 1.0 squid01.prod.mydomain:3128 (squid/2.6.STABLE14) Connection: close

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• Code Golf: Zigzag pattern scanning

  - by fbrereto

  The Challenge The shortest code by character count that takes a single input integer N (N = 3) and returns an array of indices that when iterated would traverse an NxN matrix according to the JPEG "zigzag" scan pattern. The following is an example traversal over an 8x8 matrix (referenced from here:) Examples (The middle matrix is not part of the input or output, just a representation of the NxN matrix the input represents.) 1 2 3 (Input) 3 --> 4 5 6 --> 1 2 4 7 5 3 6 8 9 (Output) 7 8 9 1 2 3 4 (Input) 4 --> 5 6 7 8 --> 1 2 5 9 6 3 4 7 10 13 14 11 8 12 15 16 (Output) 9 10 11 12 13 14 15 16 Notes: The resulting array's base should be appropriate for your language (e.g., Matlab arrays are 1-based, C++ arrays are 0-based). This is related to this question.

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• Create signed urls for CloudFront with Ruby

  - by wiseleyb

  History: I created a key and pem file on Amazon. I created a private bucket I created a public distribution and used origin id to connect to the private bucket: works I created a private distribution and connected it the same as #3 - now I get access denied: expected I'm having a really hard time generating a url that will work. I've been trying to follow the directions described here: http://docs.amazonwebservices.com/AmazonCloudFront/latest/DeveloperGuide/index.html?PrivateContent.html This is what I've got so far... doesn't work though - still getting access denied: def url_safe(s) s.gsub('+','-').gsub('=','_').gsub('/','~').gsub(/\n/,'').gsub(' ','') end def policy_for_resource(resource, expires = Time.now + 1.hour) %({"Statement":[{"Resource":"#{resource}","Condition":{"DateLessThan":{"AWS:EpochTime":#{expires.to_i}}}}]}) end def signature_for_resource(resource, key_id, private_key_file_name, expires = Time.now + 1.hour) policy = url_safe(policy_for_resource(resource, expires)) key = OpenSSL::PKey::RSA.new(File.readlines(private_key_file_name).join("")) url_safe(Base64.encode64(key.sign(OpenSSL::Digest::SHA1.new, (policy)))) end def expiring_url_for_private_resource(resource, key_id, private_key_file_name, expires = Time.now + 1.hour) sig = signature_for_resource(resource, key_id, private_key_file_name, expires) "#{resource}?Expires=#{expires.to_i}&Signature=#{sig}&Key-Pair-Id=#{key_id}" end resource = "http://d27ss180g8tp83.cloudfront.net/iwantu.jpeg" key_id = "APKAIS6OBYQ253QOURZA" pk_file = "doc/pk-APKAIS6OBYQ253QOURZA.pem" puts expiring_url_for_private_resource(resource, key_id, pk_file) Can anyone tell me what I'm doing wrong here?

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• The second argument to copy() function cannot be a directory

  - by Jorm

  Anyone know why this: $title = trim($_POST['title']); $description = trim($_POST['description']); // Array of allowed image file formats $allowedExtensions = array('jpeg', 'jpg', 'jfif', 'png', 'gif', 'bmp'); foreach ($_FILES as $file) { if ($file['tmp_name'] > '') { if (!in_array(end(explode(".", strtolower($file['name']))), $allowedExtensions)) { echo '<div class="error">Invalid file type.</div>'; } } } if (strlen($title) < 3) echo '<div class="error">Too short title</div>'; else if (strlen($description) > 70) echo '<div class="error">Too long desccription.</div>'; else { move_uploaded_file($_FILES['userfile']['tmp_name'], 'c:\wamp\www\uploads\images/'); } Gives: Warning: move_uploaded_file() [function.move-uploaded-file]: The second argument to copy() function cannot be a directory in C:\wamp\www\upload.php on line 41 Warning: move_uploaded_file() [function.move-uploaded-file]: Unable to move 'C:\wamp\tmp\php1AB.tmp' to 'c:\wamp\www\uploads\images/' in C:\wamp\www\upload.php on line 41

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• How to prevent DOS attacks using image resizing in an ASP.NET application?

  - by Waleed Eissa

  I'm currently developing a site where users can upload images to use as avatars, I know this makes me sound a little paranoid but I was wondering what if a malicious user uploads an image with incredibly large dimensions that will eat the server memory (as a DOS attack), I already have a limit on the file size that can be uploaded (250 k) but even that size can allow for an image with incredibly large dimensions if the image for example is a JPEG that contains one color and created with a very low quality setting. Taking into consideration that the image is uploaded as a bitmap in memory when being resized (ie. not compressed), I wonder if such DOS attacks occur, even to check the image dimensions it has to be uploaded in memory first, did you hear about any attacks that exploited this? Am I too worried?

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• Is there a way to initialize ImageKit's IKSaveOptions to default to TIFF with LZW compression?

  - by Rei

  I'm using Mac OS X 10.6 SDK ImageKit's IKSaveOptions to add the file format accessory to an NSSavePanel using: - (id)initWithImageProperties:(NSDictionary *)imageProperties imageUTType:(NSString *)imageUTType; and - (void)addSaveOptionsAccessoryViewToSavePanel:(NSSavePanel *)savePanel; I have tried creating an NSDictionary to specify Compression = 5, but I cannot seem to get the IKSaveOptions to show Format:TIFF, Compression:LZW when the NSSavePanel first appears. I've also tried saving the returned imageProperties dictionary and the userSelection dictionary, and then tried feeding that back in for the next time, but the NSSavePanel always defaults to Format:TIFF with Compression:None. Does anyone know how to customize the default format/compression that shows up in the accessory view? I would like to default the save options to TIFF/LZW and furthermore would like to restore the user's last file format choice for next time. I am able to control the file format using the imageUTType (e.g. kUTTypeJPEG, kUTTypePNG, kUTTypeTIFF, etc) but I am still unable to set the initial compression option for TIFF or JPEG formats. Thanks, -Rei

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